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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The degree of reaction is usually kept ________ for all types of axial flow compressors.

0.4
0.2
0.3
0.5

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Compressors, Gas Turbines and Jet Engines
The power available for takeoff and climb in case of turbojet engine as compared to reciprocating engine is

May be less or more depending on ambient conditions
Same
Less
More

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Compressors, Gas Turbines and Jet Engines
The efficiency of jet engine is

Lower at low speed
Same at all altitudes
Higher at high speed
Higher at high altitudes

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Compressors, Gas Turbines and Jet Engines
The maximum temperature in a gas turbine is

1000°C
200°C
500°C
700°C

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Compressors, Gas Turbines and Jet Engines
For maximum work, the reheating should be done to an intermediate pressure of (Where p₁ = Maximum pressure, and p₂ = Minimum pressure)

(p₁ + p₂)/2
p₁ p₂
(p₁ - p₂)/2
p₁/p₂

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Compressors, Gas Turbines and Jet Engines
Gas turbine blades are given a rake

Opposite to the direction of motion of blades
In the direction of motion of blades
Depending on the velocity
Equal to zero

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